Multiple volume encryption of storage devices using self encrypting drive (SED)

ABSTRACT

A method for encrypting data on a disk drive using self encrypting drive is provided. The method includes encryption of data chunks of a computing device. The method further includes associating the encrypted data chunks with encryption key indexes of the computing device. Moreover, the method further includes receiving the encryption key indexes for given logical block addresses of the data chunks. The method further includes determining the encryption keys to be used to encrypt the data chunks based on the encryption key indexes of the data chunks to the disk drive.

The present application is a continuation of and claims priority under35 U.S.C. §120 of U.S. patent application Ser. No. 13/930,729, filed onJun. 28, 2013, which is incorporated by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates generally to computing systems, and moreparticularly to multiple volume encryption of data on storage devicesusing self-encrypting drive (SED).

BACKGROUND

A storage system typically comprises one or more storage devices intowhich data may be entered, and from which data may be obtained, asdesired. The storage system may be implemented in accordance with avariety of storage architectures including, but not limited to, anetwork-attached storage environment, a storage area network and a diskassembly directly attached to a client or host computer. Storage systemsare typically disk drives, wherein the term “disk” commonly describes aself-contained rotating magnetic media storage device. Disks withinstorage systems are typically organized as one or more groups, whereineach group is operated as a Redundant Array of Independent Disks (RAID).Further, most RAID implementations enhance the reliability/integrity ofdata storage through the redundant writing of data “stripes” across agiven number of physical disks in the RAID group, and the appropriatestoring of redundant information with respect to the striped data. Theredundant information enables recovery of data lost when the storagesystem is inoperable or fails. Moreover, a disk or storage array of astorage system is a disk storage system which contains multiple diskdrives. For example, a disk array provides increased availability,resiliency and maintainability by using additional, redundant components(controllers, power supplies, fans, etc.), often up to the point whenall single points of failure (SPOFs) are eliminated from the design.

Moreover, storage systems typically provide logical volumes of data tocomputing systems, where each volume of data represents a logicalstorage unit, but in fact is usually implemented over several physicaldevices, e.g., RAID. Conversely, a self-encrypting disk (SED) drive ofthe storage system supports the encryption of a relatively small numberof contiguous bands of data in the drive. For example, SED enablesintegrated encryption and access control within the protected hardwareof the drive. Self-encrypting drives further provide the industry'spreferred solution for full disk encryption, protecting data when themachines or drives are lost or stolen, as well as re-purposed, warrantyrepair, and end-of-life.

SUMMARY

In one embodiment a method for encrypting data of a disk drive usingself encrypting drive (SED) is provided. The method includes encrypting,by one or more computer processors, data chunks of a computing device.The method further includes associating, by the one or more computerprocessors, the encrypted data chunks with encryption key indexes of thedevice, wherein said encryption key indexes specify encryption keys touse for each chunk. The method further includes receiving, by the one ormore computer processors, the encryption key indexes for given logicalblock addresses of the data chunks, wherein the data chunks are read orwritten to logical block addresses on the disk drive. The method furtherincludes determining, by the one or more computer processors, theencryption keys to be used to encrypt the data chunks based on theencryption key indexes of the data chunks to the disk drive.

In another embodiment, a computer system for encrypting data on a diskdrive using self encrypting drive (SED) is provided. The computer systemcomprises one or more processors, one or more computer-readablememories, one or more computer-readable tangible storage devices andprogram instructions which are stored on at least one of the one or morestorage devices for execution by at least one of the one or moreprocessors via at least one of the one or more memories. The computersystem further comprises program instructions to encrypt data chunks ofa computing device. The computer system further comprises programinstructions to associate the encrypted data chunks with encryption keyindexes of the device, wherein said encryption key indexes specifyencryption keys to use for each chunk. The computer system furthercomprises program instructions to receive, by the one or more computerprocessors, the encryption key indexes for given logical block addressesof the data chunks, wherein the data chunks are read or written tological block addresses on the disk drive. The computer system furthercomprises program instructions to determine the encryption keys to beused to encrypt the data chunks based on the encryption key indexes ofthe data chunks to the disk drive.

In yet another embodiment, a computer program product for encryptingdata on a disk drive using self encrypting drive (SED) is provided. Thecomputer program product comprises one or more computer-readabletangible storage devices and program instructions stored on at least oneof the one or more storage devices. The computer program product furthercomprises program instructions to encrypt data chunks of a computingdevice. The computer program product further comprises programinstructions to associate the encrypted data chunks with encryption keyindexes of the device, wherein said encryption key indexes specifyencryption keys to use for each chunk. The computer program productfurther comprises program instructions to receive, by the one or morecomputer processors, the encryption key indexes for given logical blockaddresses of the data chunks, wherein the data chunks are read orwritten to logical block addresses on the disk drive. The computerprogram product further comprises program instructions to determine theencryption keys to be used to encrypt the data chunks based on theencryption key indexes of the data chunks to the disk drive.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

Novel characteristics of the invention are set forth in the appendedclaims. The invention itself, however, as well as preferred mode of use,further objectives, and advantages thereof, will be best understood byreference to the following detailed description of the invention whenread in conjunction with the accompanying Figures, wherein, likereference numerals indicate like components, and:

FIG. 1A-1B are functional block diagrams of a storage computingenvironment 100 for encrypting data chunks within a disk drive ofstorage computing environment 100 using flexible key management of aself encrypting drive (SED), in accordance with embodiments of thepresent invention.

FIG. 2 is a flowchart depicting steps performed by a storage arraycontroller of a storage computing environment for encrypting data chunkswithin a disk drive of storage computing environment 100 using flexiblekey management of a self encrypting drive (SED), in accordance withembodiments of the present invention.

FIG. 3A-3D are flowcharts depicting steps performed by storage arraycontroller to process SED operations for writing encrypted data ofstorage computing environment, in accordance with embodiments of thepresent invention.

FIG. 4 illustrates a block diagram of components of computer system, inaccordance with embodiments of the present invention.

DETAILED DESCRIPTION

The present invention will now be described in detail with reference tothe accompanying Figures. Referring now to FIG. 1, storage computingenvironment 100 for encrypting data chunks within a disk drive ofstorage computing environment 100 using flexible key management thatsupports encryption of different data blocks chunks with differentencryption keys, wherein the keys do not leave the drive is shown. Eachkey can protect arbitrarily located data chunks of storage computingenvironment 100. The data protected by a given key does not have to becontinuous, nor do all regions of the data have to be the same.

For example, different chunks of data on a disk drive may differ insecurity requirements. One chunk may have no restrictions, while anothermay be associated with one user/application, and a third with adifferent application. Management of the encryption keys externallyallows a high degree of control over what data is encrypted with whichkey, but having the keys themselves stored externally is a securityrisk. On the other hand, self-encrypting disk (SED) provide secure keyusage, by ensuring that keys never leave the drive, but are inflexiblein the way keys are mapped to data. The present invention specificallyprovides levels of indirection, outside of the SED of storage computingenvironment, including, each data chunk, which is associated with a keyindex. Data associated with different key indexes is encrypted withdifferent keys, as described in further details below.

The SED receives the key index encoded as part of the logical blockaddress (LBA) of the data to be read or written, and uses the key indexto retrieve the internal encryption key. For example, consider data forvolume A that is to be written at blocks 0x100-0x200 of a storagecontroller of storage computing environment 100 using encryption by SED.Also, consider, for instance that the key index for volume A is 0x53.The storage controller will combine 0x53 to the LBA of 0x100, resultingin 0x00530000100, and send a write command to this LBA with the relevantdata. The SED internally retrieve the key associated with key index0x53, and use this key to encrypt the data actually written to thestorage media. In another example, consider data from volume B ofstorage computing environment 100 is to be read from blocks0x4000-0x4010, and the key index for volume B is 0x42. The storagecontroller will combine 0x42 to the LBA of 0x4000, resulting, say, in0x00420004000, and send a read command to this LBA. The SED willinternally retrieve the encryption key associated with key index 0x42,and use this to decrypt the data read from the storage media beforepassing it on to the storage controller. The number of different keyssupported can be large, and each encryption key can protect arbitraryregions of data, wherein the data protected by a given key does not haveto be continuous, and also, all regions of the protected data do nothave to be the same size.

For example, in a block-oriented storage system, such as a SAN, logicalstorage units (LUNs) or volumes are typically spread across severaldrives. Further, the physical location of the part of a volume that'sstored on a specific drive may change dynamically, e.g., if the volumeis resized, or if a failure occurs on another drive and the redundantdata needs to be redistributed among the remaining drives. Suchuse-cases are not well served by existing SED, which can be configuredto encrypt only contiguous ranges of addresses or bands with specifickeys. In this manner data belonging to different volumes will beencrypted with the same key if they are stored on the same band. Byspecifying which key is to be used, but not the key itself along withthe data to be read or written, it can be ensured that different volumesare encrypted by the drive with different keys, regardless of where thedata is physically stored.

Consider, for example, a volume currently taking up the first 100,000blocks of a SED. If the volume is resized such that another 50,000blocks are needed, but the next contiguous area is unavailable, thestorage controller can write the data anywhere on the drive, as long asit is associated with the same key index as the original 100,000 blocks.Moreover, a drive has two different volumes stored on it, one encryptedwith key “a” associated with key index 1, and another encrypted with key“b” associated with key index 2. For example, the storage controller caninterleave these volumes or write them in totally disjoint parts of thedisk, and the encryption keys used by one will not be used by the otheras long as the key indexes are sent correctly along with the data.

Storage computing environment 100 can be, for example a storage or diskarray. The disk array is a disk storage system which can containmultiple disk drives. For example, the disk storage system is a generalcategory of storage mechanisms where data are recorded by variouselectronic, magnetic, optical, or mechanical changes to a surface layerof one or more rotating disks. A disk drive is a device implementingsuch a storage mechanism and is usually distinguished from the diskmedium. Notable types are the hard disk drive (HDD) containing anon-removable disk, the floppy disk drive (FDD) and its removable floppydisk, and various optical disc drives and associated optical disc media.Storage computing environment 100 can also be, for example servercomputing system such as, a management server, a web server, or anyother electronic device or computing system. The server computing systemcan also represent a “cloud” of computers interconnected by one or morenetworks, wherein the server computing system can be a primary serverfor a computing system utilizing clustered computers when accessedthrough a storage computing environment.

As depicted in FIG. 1, storage computing environment 100 includesstorage array controller 110 and self-encrypting disk (SED) 120. Oneskilled in the art would appreciate storage computing environment 100includes other computing devices that are not depicted in FIG. 1.Storage array controller 110 is a storage device that handles storagerequests for storage computing environment 100, from, for example, ahost of storage computing environment 100. Storage array controller 110can also manage logical storage units across physical disk drives.Storage array controller 110 can also implement hardware RAID.

Redundant array of independent disks (RAID) is a storage technology thatcombines multiple disk drive components into one or more logical units.Data of storage array controller 110 is distributed across the drives inone of several ways called “RAID levels”, depending on the level ofredundancy and performance required, in accordance with embodiments ofthe present invention. In the depicted environment, storage arraycontroller 110 receives data request commands 130 to read or write dataon a given volume at a given logical block access range of storage arraycontroller 110. Data request commands 130 can be received from a systemsadministrator or host of storage computing environment 100. According toleast one embodiment, data request commands 130 access can be either aread or write command, wherein the data is either the data to be read orwritten. The data could also be data that is stored on the storage arraycontroller 110 in encrypted form. For example, volume 135 of a datarequest command can further be logical unit (LU) of storage arraycontroller 110 which the host or systems administrator of storagecomputing environment 100 wishes to access, typically in the form of alogical unit number (LUN), as described below.

The LUN represents a number used to identify a logical unit of storagearray controller 110. The LUN may also support read/write operations ofstorage computing environment 100, for example, in this manner, therequested data of data request command 130 is either the data to be reador written. For example, process of data request command 130 request toaccess storage computing environment 100 can include a read logicalblock addresses 1000 to 1010 of storage computing environment 100 fromlogical unit number 17. Data in this case is the data that is returnedfrom a specified storage location of storage array controller 110.Further, in another example, a data request command 130 to accessstorage computing environment 100 can also include a write whichincludes all zeroes to a logical unit number 32, which is the volume ofstorage array controller 110 for 700 blocks starting at logical blockaddress 500.

Volume 135 can be a storage element of storage array controller 110,which includes, for example, an amount of usable storage capacity thatmay be written or read from storage computing environment 100. Volume135 may also be implemented on one or more storage devices, such as,hard disk drives or solid state disks of storage computing environment100. Volume 135, which is also known as a logical unit, and identifiedby LUN of storage array controller 110. For example, LUN 17 of storagearray controller 110 can represent, for example, a volume of 17Gigabytes capacity, and LUN 42 represents a volume of 34 Gigabytescapacity.

Logical block address (LBA) is the address of a logical block of storagedata of storage array controller 110, that is, the offset of the blockfrom the beginning of the block address space of the volume containingit. For example, LBA 513 of storage array controller 110 refers to theaddress of the 513^(th) block of data in a given volume of storage arraycontroller 110. Volume key index table 140 is data table of storagearray controller 110 that includes one or more columns of the table,which determines which key index corresponds to which volume in storagearray controller 110.

For example, volume key index table 140 can include two columns,including, for example, a column with volume LUNs and another columnwith a corresponding key index. For example, the first entry of thetable could contain LUN 57 and key index 31415, the second entry of thetable could contain LUN 14 and key index 7172, etc. Logical blockaddress (LBA) modifier 145 is a functional unit of storage arraycontroller 110 that accepts as input, LBA and key index, and combinesthem into a modified LBA that SED 120 can accept and reverse operation,of a key index extractor of SED 120, as described below. For example,LBA modifier 145 operates to logically “OR” the bits of the key indexinto the most significant part of the LBA, which would otherwise be allzeroes. For example, consider the following scenario, in which, given a10 byte long LBA address space, and LBA of 0x000000000000003000(hexadecimal) and a key index of 0x1234 (hexadecimal), the resulting newLBA would be 0x123400000000003000 (hexadecimal).

FIG. 1B is functional block diagram showing detail of self encryptingdisk (SED) 120 in storage computing environment 100, in accordance withembodiments of the present invention. SED 120 is an encryption storagedevice that encrypts data of storage computing environment 100. SED 120also protects user data stored in the hard disks of storage computingenvironment 100 that is written to it, and can further decrypt the samedata read from it, using internal cryptographic keys. Moreover, inaccordance with SED 120, data stored in a hard disk of storage computingenvironment 100 is always kept encrypted, and a user can selectively andfreely turn on and off encryption functionality.

Further, SED 120 employs a disk encryption key and an authentication keyfor controlling access to a disk for directly encrypting data. Here, thehash value of the authentication key is stored in a hard disk, is usedto authenticate a user and is used to decrypt the disk encryption keyafter the user has been successfully authenticated. SED 120 includesLBA+key index 121, key index extractor 122, key index 123, key table124, encryption engine 125, encryption data 126, and drive media 127.Logical block address (LBA)+key index 121 is a combination of an indexkey of storage computing environment 100 and LBA as generated by LBAmodifier of storage array controller 110, as described above. Key index123 is the key index as extracted by key index extractor 122. Given acombined key index 123 and LBA address in the form of a modified LBA,key index extractor 122 extracts original LBA and the key index of SED120, performing the inverse operations of the LBA modified, as describedabove. For example, given a 10 byte long LBA address space, and acombined LBA of 0x12340000000000003000, key index extractor would outputan LBA of 0x00000000000000003000 and a key index of 0x1234. Key index123 is an entry into key table, including, for example, 0x1234. Keytable 124 is a table with columns, including, for example, the firstentry of the table could contain key index 31415, and the key0x3174802103936398945034112785446, the second entry of the table couldcontain key index 7172 and the key, for example,0x25712815906582353554531872087397. Encryption engine 125 is a unit thatperforms encryption and decryption of data given a cryptographic key,using a standard encryption algorithm, such as advanced encryptionstandard (AES). Encryption data is data that has been encrypted by astandard encryption algorithm using a cryptographic key. Drive media 127is a physical media of SED 120 upon which data of SED 120 is storedpersistently and retrieved upon demand.

FIG. 2 is a flowchart depicting steps performed by storage arraycontroller 110 to encrypt data on a disk drive using flexible keymanagement of SED 120 of storage computing environment 100, inaccordance with embodiments of the present invention. Storage arraycontroller 110 encrypts data chunks of a computing device, including,for example, storage array controller 110 (Step 210). For example, thedisk drive can be SED 120, wherein SED 120 encrypts data that is writtento it, and decrypts the encrypted data that is read from it using aninternal cryptographic key. SED 120 maps the encryption key indexes andencryption keys maintained internally within SED 120.

Moreover, storage array controller 110 associates the encrypted datachunks with encryption key indexes of the storage computing environment100. For example, encryption key indexes specify encryption keys to usefor each chunk of storage array controller 110 (Step 220). Theencryption key indexes provide security to the data chunks of storagecomputing environment 100. Also, the data chunk protected by theencryption key indexes does not have to be contiguous, nor do all of thechunks have to be the same size. Further, storage array controller 110receives the encryption key indexes for given logical block addresses ofthe data chunks, wherein the data chunks are read or written to logicalblock addresses on the disk drive (Step 230). For example, storage arraycontroller 110 accesses the data chunks on a given volume 135 and alogical address range of the logical block addresses of the disk drive.

For instance, volume 135 is a storage element of the disk drive, andwherein the storage element of the volume is usable storage capacity ofthe disk drive that can be written to and read from the disk drive.Volume 135 may be stored across one or more disk drives, and wherein theone or more disk drives may contain data belonging to more than onevolume. Moreover, storage array controller 110 receives logical blockaddresses and the encryption key indexes as an input of the disk driveof SED 120.

Storage array controller 110 further combines the received logical blockaddresses and the encrypted key indexes into a modified logical blockaddress, wherein the modified logical block address is accepted by thedisk drive. Moreover, storage array controller 110 defines theencryption keys to be used to encrypt the data chunks based on theencryption key indexes of the data chunks to the disk drive. (Step 240).

FIG. 3A is a flowchart depicting steps storage array controller 110 cantake to process writing to an encrypted volume of storage computingenvironment 100, in accordance with embodiments of the presentinvention. Storage array controller 110 receives a write command from ahost or systems administrator of storage computing environment 100.(Step 310). For example, the command contains the target logical unitnumber (LUN) and logical block address of data to be stored, as well asdata itself of storage computing environment 100. Storage arraycontroller 110 maps the LUN to a volume using a user defined mappingtable. For example, write block data to LBA 500 on LUN 12, where LUN 12maps to volume V1. Storage array controller 110 identifies the key index(KI) associated with volume. (Step 320). A key index can be kept foreach volume using commonly known techniques, such as a linear array,hash table, binary tree, etc. At decision 330, storage array controller110 determines whether the key index is found. If no key index is found,then at step 340, storage array controller 110 returns an error.

For example, if no key index is found, though the volume was specifiedas encrypted, there is no cryptographic key associated with the volume.One way of handling the error can include, for example, generation ofthe key index, as described below, in FIG. 3D. However, if a key indexis found, then at step 350, storage array controller 110 combines thekey index and LBA in a predefined manner, such that SED 120 is capableof extracting original values unambiguously. For example, the key indexcan be written in the most significant bits of the LBA, which can resultin an address beyond the storage range of storage computing device. Atstep 360, storage program transmits a write request to SED withresulting LBA and original data of storage computing environment 100.

FIG. 3B is a flowchart depicting steps performed by SED 120 for writingencrypted data of storage computing environment 100, in accordance withembodiments of the present invention. SED 120 receives a write requestor command with data to an address range from storage array controller110. The write request can include, for example, a command for data Daccess to address range A of storage array controller 110. (Step 410).At decision 420, SED determines if the address range, such as A,contains a key index. For example, this determination can be based onwhether if the key index was combined with the original LBA.

If no key index is found, then at step 430, SED 120 processes therequest as a regular write request. However, if a key index is found,then the corresponding encryption key is retrieved by SED 120 at step440. The key can be stored using, for example, a linear array, hashtable or binary tree. SED 120 further determines, at decision 450 if theretrieved key index includes a key. If a key is found, then at step 460,SED 120 writes it to the storage media of storage array controller 110using an encryption algorithm such as AES in an appropriate mode, suchas XTS. However, if no key is found, SED 120 transmits an error fordisplay at step 470.

FIG. 3C is a flowchart depicting steps performed by storage arraycontroller 110 to process reading from an encrypted volume of storagecomputing environment 100, in accordance with embodiments of the presentinvention. Storage array controller 110 receives a read command for anencrypted volume from storage computer environment 100. (Step 510). Forexample, a systems administrator sends a read command to storage arraycontroller 110 of storage computing environment 100.

The command includes, for example, target logical unit number (LUN) andlogical block address (LBA) of the data to be read from storage arraycontroller 110, as well as the amount of data to read. Storage arraycontroller 110 maps the LUN to a volume using a user defined mappingtable, as is standard practice. For example, read 1 block of data fromLBA 500 on LUN 12, where LUN 12 maps to volume V1. Further, given thatthe destination volume was configured as encrypted, lookup the key index(KI) associated with the volume. Also, a key index can be kept for eachvolume using commonly known techniques, such as a linear array, hashtable, binary tree, etc. (Step 520). At decision 530, storage arraycontroller 110 determines if key index was found. If no key index wasfound, storage array controller 110 returns an error at step 540. Forinstance, the error message can mean that although the volume wasspecified as encrypted, there is no cryptographic key associated withit.

If a key index is found, then at step 550, key index and logical blockaddress (LBA) are combined in a predefined manner, such that SED 120drive is capable of extracting the original value unambiguously. Forexample, the key index can be written in the most significant bits ofthe LBA, which, if interpreted literally, would result in an addressbeyond the storage range of the device. Further, at step 560, storagearray controller 110 transmits a read request to the corresponding diskor disks. This request consists of the combined LBA created in theprevious step and the amount of data to be read.

FIG. 3D is a flowchart depicting steps performed by storage arraycontroller 110 for generating a key for an encrypted volume. Storagearray controller 110 receives a request to create an encrypted volume ofstorage computing environment 100. (Step 610). For example, a systemstorage administrator of storage computing environment 100 specifiesthat an encrypted volume is to be created. Storage array controller 110creates an entry in the volume-key index table. (Step 620). For example,storage array controller 110 generates key index, and stores it, alongwith the volume identifier, in an array, hash table, binary tree orother commonly known method for storing keys and values. The key indexcan be a random number, a monotonically increasing value or an encodingof system-specific information, as long as it is unique in the system.

Storage array controller 110 sends the key index command to SED 120(Step 630). For example, storage array controller 110 sends the CreateKey command to SED 120, passing the key index generated in as aparameter. SED 120 drive generates a random key and stores it internallyunder specified key index (Step 640). For example, SED 120 internallygenerates random cryptogprahic key, and stores it internally such thatit can be retrieve upon command given corresponding key index.Thereafter, SED 120 signals that the process has been completed.

FIG. 4 is a block diagram of a computer system, in accordance with anembodiment of the present invention.

Computer system 400 is only one example of a suitable computer systemand is not intended to suggest any limitation as to the scope of use orfunctionality of embodiments of the invention described herein.Regardless, computer system 400 is capable of being implemented and/orperforming any of the functionality set forth hereinabove. In computersystem 400 there is computer 412, which is operational with numerousother general purpose or special purpose computing system environmentsor configurations. Examples of well-known computing systems,environments, and/or configurations that may be suitable for use withcomputer 412 include, but are not limited to, personal computer systems,server computer systems, thin clients, thick clients, handheld or laptopdevices, multiprocessor systems, microprocessor-based systems, set topboxes, programmable consumer electronics, network PCs, minicomputersystems, mainframe computer systems, and distributed cloud computingenvironments that include any of the above systems or devices, and thelike. Storage computing environment 100 can be implemented as aninstance of computer 412.

Computer 412 may be described in the general context of computer systemexecutable instructions, such as program modules, being executed by acomputer system. Generally, program modules may include routines,programs, objects, components, logic, data structures, and so on thatperform particular tasks or implement particular abstract data types.Computer 412 may be practiced in distributed cloud computingenvironments where tasks are performed by remote processing devices thatare linked through a communications network. In a distributed cloudcomputing environment, program modules may be located in both local andremote computer system storage media including memory storage devices.

As further shown in FIG. 4, computer 412 is shown in the form of ageneral-purpose computing device. The components of computer 412 mayinclude, but are not limited to, one or more processors or processingunits 416, memory 428, and bus 418 that couples various systemcomponents including memory 428 to processing unit 416.

Bus 418 represents one or more of any of several types of busstructures, including a memory bus or memory controller, a peripheralbus, an accelerated graphics port, and a processor or local bus usingany of a variety of bus architectures. By way of example, and notlimitation, such architectures include Industry Standard Architecture(ISA) bus, Micro Channel Architecture (MCA) bus, Enhanced ISA (EISA)bus, Video Electronics Standards Association (VESA) local bus, andPeripheral Component Interconnect (PCI) bus.

Computer 412 typically includes a variety of computer system readablemedia. Such media may be any available media that is accessible bycomputer 412, and includes both volatile and non-volatile media, andremovable and non-removable media.

Memory 428 includes computer system readable media in the form ofvolatile memory, such as random access memory (RAM) 430 and/or cache432. Computer 412 may further include other removable/non-removable,volatile/non-volatile computer system storage media. By way of exampleonly, storage system 434 can be provided for reading from and writing toa non-removable, non-volatile magnetic media (not shown and typicallycalled a “hard drive”). Although not shown, a magnetic disk drive forreading from and writing to a removable, non-volatile magnetic disk(e.g., a “floppy disk”), and an optical disk drive for reading from orwriting to a removable, non-volatile optical disk such as a CD-ROM,DVD-ROM or other optical media can be provided. In such instances, eachcan be connected to bus 418 by one or more data media interfaces. Aswill be further depicted and described below, memory 428 may include atleast one program product having a set (e.g., at least one) of programmodules that are configured to carry out the functions of embodiments ofthe invention.

Storage array controller 110 can be stored in memory 428 by way ofexample, and not limitation, as well as an operating system, one or moreapplication programs, other program modules, and program data. Each ofthe operating system, one or more application programs, other programmodules, and program data or some combination thereof, may include animplementation of a networking environment. Program modules 442generally carry out the functions and/or methodologies of embodiments ofthe invention as described herein. Storage array controller 110 can beimplemented as an instance of program 440.

Computer 412 may also communicate with one or more external devices 414such as a keyboard, a pointing device, etc., as well as display 424; oneor more devices that enable a user to interact with computer 412; and/orany devices (e.g., network card, modem, etc.) that enable computer 412to communicate with one or more other computing devices. Suchcommunication occurs via Input/Output (110) interfaces 422. Still yet,computer 412 communicates with one or more networks such as a local areanetwork (LAN), a general wide area network (WAN), and/or a publicnetwork (e.g., the Internet) via network adapter 420. As depicted,network adapter 420 communicates with the other components of computer412 via bus 418. It should be understood that although not shown, otherhardware and/or software components could be used in conjunction withcomputer 412. Examples, include, but are not limited to: microcode,device drivers, redundant processing units, external disk drive arrays,RAID systems, tape drives, and data archival storage systems, etc.

The flowchart and block diagrams in the Figures illustrate thearchitecture, functionality, and operation of possible implementationsof systems, methods and computer program products according to variousembodiments of the present invention. In this regard, each block in theflowchart or block diagrams may represent a module, segment, or portionof code, which comprises one or more executable instructions forimplementing the specified logical function(s). It should also be notedthat, in some alternative implementations, the functions noted in theblock may occur out of the order noted in the Figures. For example, twoblocks shown in succession may, in fact, be executed substantiallyconcurrently, or the blocks may sometimes be executed in the reverseorder, depending upon the functionality involved. It will also be notedthat each block of the block diagrams and/or flowchart illustration, andcombinations of blocks in the block diagrams and/or flowchartillustrations are implemented by special purpose hardware-based systemsthat perform the specified functions or acts, or combinations of specialpurpose hardware and computer instructions.

As will be appreciated by one skilled in the art, embodiments of thepresent invention may be embodied as a system, method or computerprogram product. Accordingly, embodiments of the present invention maytake the form of an entirely hardware embodiment, an entirely softwareembodiment (including firmware, resident software, micro-code, etc.) oran embodiment combining software and hardware aspects that may allgenerally be referred to herein as a “circuit,” “module” or “system.”Furthermore, embodiments of the present invention may take the form of acomputer program product embodied in one or more computer-readablemedium(s) having computer-readable program code embodied thereon.

In addition, any combination of one or more computer-readable medium(s)may be utilized. The computer-readable medium may be a computer-readablesignal medium or a computer-readable storage medium. A computer-readablestorage medium may be, for example, but not limited to, an electronic,magnetic, optical, electromagnetic, infrared, or semiconductor system,apparatus, or device, or any suitable combination of the foregoing. Morespecific examples (a non-exhaustive list) of the computer-readablestorage medium would include the following: an electrical connectionhaving one or more wires, a portable computer diskette, a hard disk, arandom access memory (RAM), a read-only memory (ROM), an erasableprogrammable read-only memory (EPROM or Flash memory), an optical fiber,a portable compact disc read-only memory (CD-ROM), an optical storagedevice, a magnetic storage device, or any suitable combination of theforegoing. In the context of this document, a computer-readable storagemedium may be any tangible medium that contains, or stores a program foruse by or in connection with an instruction execution system, apparatus,or device.

A computer-readable signal medium may include a propagated data signalwith computer-readable program code embodied therein, for example, inbaseband or as part of a carrier wave. Such a propagated signal may takeany of a variety of forms, including, but not limited to,electro-magnetic, optical, or any suitable combination thereof. Acomputer-readable signal medium may be any computer-readable medium thatis not a computer-readable storage medium and that communicates,propagate, or transport a program for use by or in connection with aninstruction execution system, apparatus, or device.

Program code embodied on a computer-readable medium may be transmittedusing any appropriate medium, including but not limited to wireless,wireline, optical fiber cable, RF, etc., or any suitable combination ofthe foregoing. Computer program code for carrying out operations forembodiments of the present invention may be written in any combinationof one or more programming languages, including an object orientedprogramming language such as Java, Smalltalk, C++ or the like,conventional procedural programming languages such as the “C”programming language, a hardware description language such as Verilog,or similar programming languages. The program code may execute entirelyon the user's computer, partly on the user's computer, as a stand-alonesoftware package, partly on the user's computer and partly on a remotecomputer or entirely on the remote computer or server. In the latterscenario, the remote computer may be connected to the user's computerthrough any type of network, including a local area network (LAN) or awide area network (WAN), or the connection may be made to an externalcomputer (for example, through the Internet using an Internet ServiceProvider). The computer program instructions may also be loaded onto acomputer, other programmable data processing apparatus, or other devicesto cause a series of operational steps to be performed on the computer,other programmable apparatus or other devices to produce a computerimplemented process such that the instructions which execute on thecomputer or other programmable apparatus provide processes forimplementing the functions/acts specified in the flowchart and/or blockdiagram block or blocks.

Based on the foregoing a method for encrypting data on a disk driveusing self encrypting drive (SED) have been disclosed. However, numerousmodifications and substitutions can be made without deviating from thescope of the present invention. In this regard, each block in theflowcharts or block diagrams may represent a module, segment, or portionof code, which comprises one or more executable instructions forimplementing the specified logical function(s). It should also be notedthat, in some alternative implementations, the functions noted in theblock may occur out of the order noted in the Figures. Therefore, thepresent invention has been disclosed by way of example and notlimitation.

What is claimed is:
 1. A method for encrypting data on a disk driveusing self encrypting drive (SED), the method comprising the steps of:encrypting, by one or more computer processors, data chunks of acomputing device; associating, by the one or more computer processors,the encrypted data chunks with encryption key indexes of the computingdevice; receiving, by the one or more computer processors, theencryption key indexes for given logical block addresses of the datachunk; and determining, by the one or more computer processors, theencryption keys to be used to encrypt the data chunks based on theencryption key indexes of the data chunks to the disk drive.
 2. Themethod of claim 1, wherein the encryption key indexes provide securityto the data chunks of the computing device, and wherein the data chunksprotected by the encryption key indexes does not have to be contiguous,nor do all of the chunks have to be the same size.
 3. The method ofclaim 1, wherein the step of receiving, by the one or more computerprocessors, the encryption key indexes for logical block addresses ofthe data chunks, further includes the step of: accessing, by the one ormore computer processors, the data chunks on a given volume and alogical address range of the logical block addresses of the disk drive.4. The method of claim 3, wherein the volume is a storage element of thedisk drive, and wherein the storage element of the volume is usablestorage capacity of the disk drive that can be written to and read fromof the disk drive.
 5. The method of claim 4, wherein the volume isstored across one or more disk drives, and wherein the one or more diskdrives may contain data belonging to more than one volume.
 6. The methodof claim 1, further including the step of: receiving, by the one or morecomputer processors, the logical block addresses and the encryption keyindexes as an input of the disk drive; and combining, by the one or morecomputer processors, the received logical block addresses and theencrypted key indexes into a modified logical block address, wherein themodified logical block address is accepted by the disk drive.
 7. Themethod according to claim 1, wherein the disk drive is a self encryptingdrive that maps the encryption key indexes and the encryption keysmaintained internally within the self encrypting drive, and wherein theself encrypting drive encrypts data that is written to it, and decryptsthe encrypted data that is read from it using internal cryptographickeys.
 8. A computer system for encrypting data on a disk drive usingself encrypting drive (SED), the computer system comprising: one or moreprocessors, one or more computer-readable memories, one or morecomputer-readable tangible storage devices and program instructionswhich are stored on at least one of the one or more storage devices forexecution by at least one of the one or more processors via at least oneof the one or more memories, the program instructions comprising:program instructions to encrypt, by one or more computer processors,data chunks of a computing device; program instructions to associate, bythe one or more computer processors, the encrypted data chunks withencryption key indexes of the computing device; program instructions toreceive, by the one or more computer processors, the encryption keyindexes for given logical block addresses of the data chunk; and programinstructions to determine, by the one or more computer processors, theencryption keys to be used to encrypt the data chunks based on theencryption key indexes of the data chunks to the disk drive.
 9. Thecomputer system of claim 8, wherein the encryption key indexes providesecurity to the data chunks of the computing device, and wherein thedata chunks protected by the encryption key indexes does not have to becontiguous, nor do all of the chunks have to be the same size.
 10. Thecomputer system of claim 8, wherein program instructions to receive theencryption key indexes for logical block addresses of the data chunks,further includes: program instructions to access, by the one or morecomputer processors, the data chunks on a given volume and a logicaladdress range of the logical block addresses of the disk drive.
 11. Thecomputer system of claim 10, wherein the volume is a storage element ofthe disk drive, and wherein the storage element of the volume is usablestorage capacity of the disk drive that can be written to and read fromof the disk drive.
 12. The computer system of claim 11, wherein thevolume is stored across one or more disk drives, and wherein the one ormore disk drives may contain data belonging to more than one volume. 13.The computer system of claim 8, further includes: program instructionsto receives the logical block addresses and the encryption key indexesas an input of the disk drive; and program instructions to combine thereceived logical block addresses and the encrypted key indexes into amodified logical block address, wherein the modified logical blockaddress is accepted by the disk drive.
 14. The computer system of claim8, wherein the disk drive is a self encrypting drive that maps theencryption key indexes and the encryption keys maintained internallywithin the self encrypting drive, and wherein the self encrypting driveencrypts data that is written to it, and decrypts the encrypted datathat is read from it using internal cryptographic keys.
 15. A computerprogram product for encrypting data on a disk drive using selfencrypting drive (SED), the computer program product comprising: one ormore computer-readable tangible storage devices and program instructionsstored on at least one of the one or more storage devices, the programinstructions comprising: program instructions to encrypt, by one or morecomputer processors, data chunks of a computing device; programinstructions to associate, by the one or more computer processors, theencrypted data chunks with encryption key indexes of the computingdevice; program instructions to receive, by the one or more computerprocessors, the encryption key indexes for given logical block addressesof the data chunk; and program instructions to determine, by the one ormore computer processors, the encryption keys to be used to encrypt thedata chunks based on the encryption key indexes of the data chunks tothe disk drive.
 16. The computer program product of claim 15, whereinthe encryption key indexes provide security to the data chunks of thecomputing device, and wherein the data chunks protected by theencryption key indexes does not have to be contiguous, nor do all of thechunks have to be the same size.
 17. The computer program product ofclaim 15, wherein program instructions to receive the encryption keyindexes for logical block addresses of the data chunks, wherein thelogical block addresses of the data chunks are read or written to thedisk drive, further includes: program instructions to access, by the oneor more computer processors, the data chunks on a given volume and alogical address range of the logical block addresses of the disk drive.18. The computer program product of claim 17, wherein the volume is astorage element of the disk drive, and wherein the storage element ofthe volume is usable storage capacity of the disk drive that can bewritten to and read from of the disk drive.
 19. The computer programproduct of claim 18, wherein the volume is stored across one or moredisk drives, and wherein the one or more disk drives may contain databelonging to more than one volume.
 20. The computer program product ofclaim 15, further includes: program instructions to receives the logicalblock addresses and the encryption key indexes as an input of the diskdrive; and program instructions to combine the received logical blockaddresses and the encrypted key indexes into a modified logical blockaddress, wherein the modified logical block address is accepted by thedisk drive.